DE19581517T1 - Method for stabilizing unstable ends of an oxymethylene copolymer - Google Patents

Method for stabilizing unstable ends of an oxymethylene copolymer

Info

Publication number
DE19581517T1
DE19581517T1 DE19581517T DE19581517T DE19581517T1 DE 19581517 T1 DE19581517 T1 DE 19581517T1 DE 19581517 T DE19581517 T DE 19581517T DE 19581517 T DE19581517 T DE 19581517T DE 19581517 T1 DE19581517 T1 DE 19581517T1
Authority
DE
Germany
Prior art keywords
oxymethylene copolymer
stabilizing unstable
unstable ends
stabilizing
oxymethylene
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
DE19581517T
Other languages
German (de)
Other versions
DE19581517C2 (en
Inventor
Yukio Tanigawa
Hirohisa Morishita
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Asahi Kasei Corp
Original Assignee
Asahi Chemical Industry Co Ltd
Asahi Kasei Kogyo KK
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=13527007&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=DE19581517(T1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Asahi Chemical Industry Co Ltd, Asahi Kasei Kogyo KK filed Critical Asahi Chemical Industry Co Ltd
Publication of DE19581517T1 publication Critical patent/DE19581517T1/en
Application granted granted Critical
Publication of DE19581517C2 publication Critical patent/DE19581517C2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J19/18—Stationary reactors having moving elements inside
    • B01J19/20—Stationary reactors having moving elements inside in the form of helices, e.g. screw reactors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
    • B29C48/40—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders
    • B29C48/402—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders the screws having intermeshing parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/50—Details of extruders
    • B29C48/505—Screws
    • B29C48/565—Screws having projections other than the thread, e.g. pins
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G2/00—Addition polymers of aldehydes or cyclic oligomers thereof or of ketones; Addition copolymers thereof with less than 50 molar percent of other substances
    • C08G2/30—Chemical modification by after-treatment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Polyoxymethylene Polymers And Polymers With Carbon-To-Carbon Bonds (AREA)
DE19581517T 1994-03-22 1995-03-22 Method for stabilizing unstable ends of an oxymethylene copolymer Expired - Lifetime DE19581517C2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP7374294 1994-03-22
PCT/JP1995/000530 WO1995025761A1 (en) 1994-03-22 1995-03-22 Method of stabilizing molecular ends of oxymethylene copolymer

Publications (2)

Publication Number Publication Date
DE19581517T1 true DE19581517T1 (en) 1997-04-24
DE19581517C2 DE19581517C2 (en) 2001-01-25

Family

ID=13527007

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19581517T Expired - Lifetime DE19581517C2 (en) 1994-03-22 1995-03-22 Method for stabilizing unstable ends of an oxymethylene copolymer

Country Status (6)

Country Link
US (1) US5811511A (en)
JP (1) JP2884439B2 (en)
CN (1) CN1050614C (en)
DE (1) DE19581517C2 (en)
TW (1) TW357163B (en)
WO (1) WO1995025761A1 (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19936715A1 (en) * 1999-08-06 2001-02-15 Ticona Gmbh Low-emission colored polyoxymethylene molding compounds
US6396569B2 (en) 1999-09-02 2002-05-28 Texas Instruments Incorporated Image displacement test reticle for measuring aberration characteristics of projection optics
TWI221406B (en) 2001-07-30 2004-10-01 Epix Medical Inc Systems and methods for targeted magnetic resonance imaging of the vascular system
JP2005264101A (en) * 2004-03-22 2005-09-29 Asahi Kasei Chemicals Corp Polyacetal resin
JP4516801B2 (en) * 2004-08-23 2010-08-04 東レ株式会社 Method for producing oxymethylene copolymer
JP2006291001A (en) * 2005-04-08 2006-10-26 Mitsubishi Gas Chem Co Inc Method for producing polyacetal resin composition reduced in formaldehyde content
JP5067157B2 (en) * 2005-04-12 2012-11-07 三菱瓦斯化学株式会社 Process for producing polyoxymethylene copolymer
DE102008018966A1 (en) 2008-04-16 2009-10-22 Ticona Gmbh Process for the preparation of oxymethylene polymers and apparatus suitable therefor
EP2546272A1 (en) 2011-07-15 2013-01-16 Ticona GmbH Process for producing oxymethylene polymers
EP3804934A1 (en) * 2019-10-10 2021-04-14 Covestro Deutschland AG Extruder with screw elements with particularly large incline in the area of the degassing opening

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2408481C3 (en) * 1974-02-22 1981-12-24 Hoechst Ag, 6000 Frankfurt Process for the preparation of a stabilized oxymethylene copolymer
JPS55157617A (en) * 1979-05-28 1980-12-08 Mitsubishi Gas Chem Co Inc Thermal stabilization of oxymethylene copolymer
JPS57538A (en) * 1980-06-03 1982-01-05 Mitsubishi Heavy Ind Ltd Inspecting and diagnosing device for automobile or the like
JPS5811450B2 (en) * 1980-11-20 1983-03-03 三菱瓦斯化学株式会社 Method for thermal stabilization of oxymethylene copolymers
JPS5811450A (en) * 1981-07-09 1983-01-22 Toshiba Corp Facsimile device
CA1198246A (en) * 1982-02-19 1985-12-17 Ananda M. Chatterjee Process and apparatus for continual melt hydrolysis of acetal copolymers
US4666995A (en) * 1984-10-25 1987-05-19 Celanese Corporation Oxymethylene polymer molding compositions having enhanced resistance to black speck formation
JPS61209216A (en) * 1985-03-14 1986-09-17 Japan Synthetic Rubber Co Ltd Production of oxymethylene copolymer
JPS62129311A (en) * 1985-11-29 1987-06-11 Japan Synthetic Rubber Co Ltd Production of oxymethylene copolymer
JPH0730150B2 (en) * 1986-07-03 1995-04-05 東レ株式会社 Method for producing stable oxymethylene copolymer
JPS6314215A (en) * 1986-07-04 1988-01-21 Hitachi Ltd Reduction system for current consumption
JP3033096B2 (en) * 1989-09-21 2000-04-17 東レ株式会社 Method for producing polyoxymethylene copolymer for injection molding

Also Published As

Publication number Publication date
DE19581517C2 (en) 2001-01-25
CN1050614C (en) 2000-03-22
CN1143375A (en) 1997-02-19
WO1995025761A1 (en) 1995-09-28
US5811511A (en) 1998-09-22
JP2884439B2 (en) 1999-04-19
TW357163B (en) 1999-05-01

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Legal Events

Date Code Title Description
OP8 Request for examination as to paragraph 44 patent law
8607 Notification of search results after publication
D2 Grant after examination
8327 Change in the person/name/address of the patent owner

Owner name: ASAHI KASEI KABUSHIKI KAISHA, OSAKA, JP

8364 No opposition during term of opposition
R071 Expiry of right